warnLowDiskSpace's properties
emailTo
separated email addresses to send email to. If empty then system admins will be notified
"emailTo" : "administrator@example.com;admin@example.com"
enabled
boolean value to enable/disable the feautre.
default: true
emailFrequency
how often the email should be sent in seconds
default: 86400 //24 * 60 *60 (1 day in seconds)
minimum: 3600 //(1 hour)
minFreeDisk
minimum free space in MB that triggers the warning email, by default 10 Gbytes.
default: 10240 //10GB
minPercentage
the minimum percentage of the disk space that triggers a warning
default: 5 //5%